Dental fastening means



March 15, A. K. SIMMONS DENTAL FASTENING MEANS O inal Filed Aug. 24, 1923 Fla. .9

[Tu/ant er AL FRED KfiMMo/w ATTOENE' Y5 ALFRED 1K3 sI r-ons, or FABI-BAULT,1MINNESOPJJA.*

' .nnn'rnnres'rnmneMeans.

original.applicationfiledAugnst'24,,1922., Serial No. 584,115. Patent No. 1.589,99 4,:dated June; 22,1926. .Divi 'deduanglthis application filed January 21,, 1924.. Serial No. 687,601.

. This invention relates to fastening-means those skilled ill/this art. Such plates are frequently of metal alloys or of a compos1- tion known as. vulcanite. v

i'llfie subject-matterof this application is disclosed in applicants prior co-pendingappli'cation, Serial'fNumber 584,115, filed August 24, 1922, and is divisionalthereof.

' When securing artificial teeth, crowns, dental bridge work, etc.,pto these Jd'en'tal plates or bridge sections, it isnecessary to aflix the teeth, etc., to the plates, crowns and bridges, etc, in such manner that the teeth are not liable to longitudinal or lateral displacement nor to rotative tendencles. 'The disadvantages of such'displ'acements are obvious tothose skilled in this art. This novel fasteningmeans is adapted to be embedded within'thev plate with a portion projecting therefromffor attachment to the artificial "tooth'or crown, "The base of the fastening means preferably has an angular periphery to resist rotative' tendencies and has asom'ewhat rregularly shapedprqectlon inwardly extending'it'rom wh'atmayf be termed the inner face of the base. The tooth-securing -means projects I outwardly from what may betermed the outer face-of the base portion. It is this tooth-securing means, here shown for example as an abutment, which projects 'from the surface of thedental plate within j "whichthe fastening means be operatively embedded. .The tooth is adapted to be secured to such abutmentas by nieans of the usual dental cement.

"The object therefore of this invention is 7' toiprovide animproved fastening means for use with artificial dentures, crowns, dental. bridges, etc. Other objects. of the invention will more 'ful'ly appear from the followingdescription *aridthej accompanying drawings and will be-p'ointed -outini the annexed claims.

In the drawings,'there has been disclosed a. structure designedto carry out the objects of the invention, 'but' it is to beunderstood' 'that the invention is not 'confined to the". exact features shown, as various changes: maybe made within the scopeof'f'the' claims which I follow.

In the'drawings: Figure l is a perspective view of.the fastening means; f t

Figure 2 'is'a vertical sectionalIview on the'line 22'of1Figure 1; f i

. Figure 3 is a view in frontelevation of the fastening means shown iri'Figure 1 but with the peripheral base-groove omitted and with the addition of laterallydepending wings;

Figure 4t is a perspective view of a 's 'liglrtly modifiedform of inner; projection; r,

Figure 5fis a view in. frontCelevationof i the form-shown in Figure 4:,but withfthe peripheral base-groove omitted} and withthe addition of laterally dep'en'dingwings; c

, Figure 6 is a view in side elevationyof 'the form shown in Figure 5;

Figure 7 is a vertical section :onfthe'l'i ne' 7+7 of Figure 4,;

Figure 8 is a view in side elevation of a 7 novel tooth adaptedfor use with the novel fastening means; and .7

Figure 9 is a plan view thereof.- g It is broadly old in'this' art to secure 'art'ifi- 'cial teeth or similar bodiestodental plates,

bridges, etc. and the. invention herein resides in the provision of an improved fastening means adapted- 'to be cast, vulcanizedjor otherwise, embedded in the [plate either with the tooth secured thereto or so that'the-tooth may be conveniently secured thereto or rtes5 placed "after emplacement of the f fastening means.- V I The form shown in Figures 1 and2' is one moreparticularly adapted for use wi'thlmetallic, plates Wh'ilethe form shown in .Figu liesaeo 4, 5'and 6 is' more particularly adapted for usewith the rubber composition plates or'therwelleknown; vulcanite plates. 'i This novel-I fastening means in the form shown in Figures 1 and 2'is of metal and consistsof-a a a base 8 which is preferablyj of afiform pther than circular sothat,'when' 'it is embedded in a tooth, rotative tendencies.willj bej' overcome. Its form here shown is an angular one, substantially: a square having. slightly: r1 0 V rounded corners, and for convenience of reference, the two opposed faces of the base maybe referred to as the inner and outer,

the inner face being the one which is adjacent the surface of the dental plate when this fastening device is in its embedded working position.

The base is preferably provided with means projecting from. its inner face which thus extends into the material of the dental plate. This inwardly projecting member is shown in Figures 1 and 2 as formed by an integralupstanding rib 9 which presents a recess 11. This rib is preferably shaped to provide a plurality of angles whereby, when the fasteningrmeans is affixed to a dental plate,- the material of the plate will extend within the recess 11 and will surround the irregular continuous rib 9 and effect a re tentive holding of the fastening means to the plate. The periphery of the base 8 may be recessed, as is shown in Figure 1, wherein the adjacent portions of two adjoining peripheral. faces of the base are provided with communicating grooves 12... The

grooves are useful in crown and bridge-work wherein the inner projecting portion formed the fastening means. Such wing-like mem by the ribs'9 is embedded in the metal of the crown or bridge and additional metal is cast to provide depending wing-like members upon the distal and mesial portions of a dental plate with the outer tooth-securing 'me'ans' extending exteriorly thereof, the.

tooth or crown may be secured toth-e fastening-means evenif the latter is in its operative position. This outer projecting means is shown as a lug or. abutment 1-3. The outer face oft-his abutment 13 is reentlrantly V-shaped to form the two terminals 14; and 15, the former extending farther from the base than the latter. 'Thelatcral faces of the abutment are outwardly divergent so that the abutment is thicker at its outward 7 end than it is at its base.

I A modification of the base of this novel fastening-means is shown in Figure 3,. ,whereln the depending wings 16 and 17 are added to the base on either side of the abut- ;ment. @The .abutment is adapted to be received within a recess formed in the tooth or crown which is to be secured to the dental plates by means of this fastening device. The abutment is usually held within the toothed recess by means of any common form of dental cement. type is used, the opposed faces of the tooth or crown are suitably recessed, as is shown in Figures 8 and 9, to receive these wings which are likewise cemented in position.

The V-shaped outer face of the abutment with its spaced terminals tends to prevent any fore or aft rocking of the affixed tooth while the wings prevent any lateral rocking tendencies between the tooth andits'fastening-means. V

The form shown in'Figures 1 and 7 is more particularly adapted for use with the rubber composition or so-called vulcanite dental plates. In this form, the member which projects from the inner face consists I of an integral plate 21 which is spaced from the base 81by means of a short integral neck 22 so that this plate 21 overhangs the major portion of the base. Thev inner face of this plate is generally concave and is preferably provided with a, central rec-ess'23 fora pur-.

pose similar to that of the recess ll'of the previously mentloned metal plat-e form.

This form, similar to the other form, is preferably made of one of the precious or semi- .VVhen the wing.

precious metals or alloys used in dental art. provided with the angular peripheral grooves 12 and with the depending wings l6 and 17 as shown in Figures 5 and6. The abutment employed is like that shown in Figure 1 and hasthe same function. I Having thus described my invention what I claim as new and'desire to secure by Letters-Patent, is: V a

1. In a dental fastening means, the combination of abase having anangular periph ery, an abutment projecting from the outer face of the base and adapted to have an artificial tooth or crown secured thereto, said base being adapted to be embedded in adenture, crown or bridge with the abutment extending exteriorly thereof whereby said tooth or crown may be secured to the positioned base, the periphery of the base being recessed adjacent its anglieflso that when the base is embedded in a plastic ma-' .terial of a denture, crown or bridge, the material will extend into said angular recesses and, upon hardening, will assist in.

preventing relative movement of the base.

2. In a dental fastening means, the combination of a base having an angular periphcry to prevent axial rotation of the base when embedded in a denture, crown or bridge,.an elongated rib projecting inwardly from the inner face of the base, said rib being angularly shaped to aid in preventing axial rotation of the base, and tooth-securing This modified form may likewise be means extending from the outer face of the base.

3. In a dental fastening means, the combination of a base having an angular periphery to prevent axial rotation of the base when embedded 1n a denture, crown or bridge, an elongated projectioninwardly and a plurality of the angles of the base periphery 'and ofsaid projection being olfset, and tooth-securing means extending from the outer face of the base. t

In Witness whereof, I have hereunto set my hand this 4th day of J anuary 1924.

ALFRED K. SIMMONS. 

